/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    color: #1c1c1e;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

h1,
h2,
h3 {
    line-height: 1.25;
    margin: 0 0 0.6em;
    color: #111;
}

h1 {
    font-size: 2.4rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.6rem;
    margin-top: 1.6em;
}

h3 {
    font-size: 1.2rem;
    margin-top: 1.4em;
}

p {
    margin: 0 0 1em;
}

/* ---------- Layout ---------- */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

main {
    flex: 1;
    padding: 2.5rem 0 4rem;
}

/* ---------- Header / nav ---------- */
.site-header {
    border-bottom: 1px solid #e5e5ea;
    background: #ffffff;
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.9rem 0;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    color: #111;
}

.nav-brand:hover {
    text-decoration: none;
}

.nav-logo {
    height: 36px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #333;
    font-weight: 500;
    padding: 0.25rem 0;
}

.nav-links a.active {
    color: #0066cc;
}

/* ---------- Hero (landing) ---------- */
.hero {
    text-align: center;
    padding: 3rem 1rem 2.5rem;
    background-image: linear-gradient(rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.85)),
        url('/content/img/back01.png');
    background-size: cover;
    background-position: center;
    border-radius: 16px;
    margin-bottom: 2rem;
}

.hero-title {
    margin: 0 0 0.5em;
}

.hero-logo {
    max-width: 360px;
    width: 80%;
    margin: 0 auto;
    display: block;
}

.hero p.lead {
    font-size: 1.2rem;
    color: #444;
    max-width: 38em;
    margin: 0 auto 1.5rem;
}

.app-store-badge {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.85rem 1.5rem;
    background: #111;
    color: #fff;
    border-radius: 10px;
    font-weight: 600;
}

.app-store-badge:hover {
    background: #333;
    text-decoration: none;
}

/* ---------- Screenshots ---------- */
.screenshots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.screenshot {
    aspect-ratio: 9 / 16;
    background: linear-gradient(135deg, #e5e5ea, #c7c7cc);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c6c70;
    font-size: 0.9rem;
}

/* ---------- About section card (landing) ---------- */
.about-section {
    background-image: linear-gradient(rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.92)),
        url('/content/img/back02.png');
    background-size: cover;
    background-position: center;
    border-radius: 16px;
    padding: 2rem;
    margin-top: 2rem;
}

/* ---------- Generic content sections ---------- */
.content h1:first-child,
.content h2:first-child {
    margin-top: 0;
}

.content ul,
.content ol {
    padding-left: 1.5rem;
    margin: 0 0 1em;
}

.content li {
    margin-bottom: 0.35em;
}

.meta {
    color: #6c6c70;
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

/* ---------- FAQ ---------- */
.faq details {
    border-top: 1px solid #e5e5ea;
    padding: 1rem 0;
}

.faq details:last-of-type {
    border-bottom: 1px solid #e5e5ea;
}

.faq summary {
    cursor: pointer;
    font-weight: 600;
    color: #111;
    list-style: none;
    padding-left: 2rem;
    background-image: url('/content/img/icon_question.png');
    background-repeat: no-repeat;
    background-position: 0 0.15em;
    background-size: 1.3em 1.3em;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary:hover {
    color: #0066cc;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid #e5e5ea;
    background: #f7f7f8;
    padding: 2rem 0 1.5rem;
    font-size: 0.92rem;
    color: #555;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-grid h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6c6c70;
    margin: 0 0 0.5em;
}

.footer-grid ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-grid li {
    margin-bottom: 0.35em;
}

.footer-grid a {
    color: #333;
}

.copyright {
    border-top: 1px solid #e5e5ea;
    padding-top: 1rem;
    color: #6c6c70;
    font-size: 0.85rem;
}

/* ---------- Small screens ---------- */
@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }

    .hero {
        padding: 2rem 1rem 1.5rem;
    }

    .nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-logo {
        height: 32px;
    }
}